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Simplifying 8 = x + 1.2(7 + x) 8 = x + (7 * 1.2 + x * 1.2) 8 = x + (8.4 + 1.2x) Reorder the terms: 8 = 8.4 + x + 1.2x Combine like terms: x + 1.2x = 2.2x 8 = 8.4 + 2.2x Solving 8 = 8.4 + 2.2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.2x' to each side of the equation. 8 + -2.2x = 8.4 + 2.2x + -2.2x Combine like terms: 2.2x + -2.2x = 0.0 8 + -2.2x = 8.4 + 0.0 8 + -2.2x = 8.4 Add '-8' to each side of the equation. 8 + -8 + -2.2x = 8.4 + -8 Combine like terms: 8 + -8 = 0 0 + -2.2x = 8.4 + -8 -2.2x = 8.4 + -8 Combine like terms: 8.4 + -8 = 0.4 -2.2x = 0.4 Divide each side by '-2.2'. x = -0.1818181818 Simplifying x = -0.1818181818
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